Experimental Study Of The Flexural Waves In The Fractured Or Cased Borehole Model
The ultrasonic logging is performed with dipole transducers in aluminum and lucite borehole models to study the propagation of the flexural waves in a fractured or cased borehole. The experimental results show that the flexural wave is much more sensitive to a horizontal fracture than to a vertic...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Technical Report |
| Published: |
Massachusetts Institute of Technology. Earth Resources Laboratory
2012
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| Online Access: | http://hdl.handle.net/1721.1/75230 |
| _version_ | 1826205995936776192 |
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| author | Zhu, Zhenya Cheng, C. H. Toksoz, M. N. |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Zhu, Zhenya Cheng, C. H. Toksoz, M. N. |
| author_sort | Zhu, Zhenya |
| collection | MIT |
| description | The ultrasonic logging is performed with dipole transducers in aluminum and lucite
borehole models to study the propagation of the flexural waves in a fractured or cased
borehole. The experimental results show that the flexural wave is much more sensitive
to a horizontal fracture than to a vertical one. The propagation of flexural waves in
a borehole with an inclined fracture is related to both the polarization of the flexural
wave and the direction of the fracture. The experimental results show that a very strong
low-frequency flexural wave can be generated by a dipole source in a cased borehole and
it propagates with the shear wave velocity of the formation. High-frequency waves
generated by a dipole source propagate with the compressional wave and flexural wave
velocities of the casing. Dipole acoustic well logging could be an effective means for
determining horizontal and declined fractures and measuring the formation shear wave
velocity in a cased borehole. |
| first_indexed | 2024-09-23T13:22:20Z |
| format | Technical Report |
| id | mit-1721.1/75230 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:22:20Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology. Earth Resources Laboratory |
| record_format | dspace |
| spelling | mit-1721.1/752302019-04-10T18:05:21Z Experimental Study Of The Flexural Waves In The Fractured Or Cased Borehole Model Zhu, Zhenya Cheng, C. H. Toksoz, M. N. Massachusetts Institute of Technology. Earth Resources Laboratory Zhu, Zhenya Cheng, C. H. Toksoz, M. N. The ultrasonic logging is performed with dipole transducers in aluminum and lucite borehole models to study the propagation of the flexural waves in a fractured or cased borehole. The experimental results show that the flexural wave is much more sensitive to a horizontal fracture than to a vertical one. The propagation of flexural waves in a borehole with an inclined fracture is related to both the polarization of the flexural wave and the direction of the fracture. The experimental results show that a very strong low-frequency flexural wave can be generated by a dipole source in a cased borehole and it propagates with the shear wave velocity of the formation. High-frequency waves generated by a dipole source propagate with the compressional wave and flexural wave velocities of the casing. Dipole acoustic well logging could be an effective means for determining horizontal and declined fractures and measuring the formation shear wave velocity in a cased borehole. Massachusetts Institute of Technology. Borehole Acoustics and Logging Consortium United States. Dept. of Energy (Grant DE-FG02-86ER13636) 2012-12-05T18:31:20Z 2012-12-05T18:31:20Z 1994 Technical Report http://hdl.handle.net/1721.1/75230 Earth Resources Laboratory Industry Consortia Annual Report;1994-07 application/pdf Massachusetts Institute of Technology. Earth Resources Laboratory |
| spellingShingle | Zhu, Zhenya Cheng, C. H. Toksoz, M. N. Experimental Study Of The Flexural Waves In The Fractured Or Cased Borehole Model |
| title | Experimental Study Of The Flexural Waves In The Fractured Or Cased Borehole Model |
| title_full | Experimental Study Of The Flexural Waves In The Fractured Or Cased Borehole Model |
| title_fullStr | Experimental Study Of The Flexural Waves In The Fractured Or Cased Borehole Model |
| title_full_unstemmed | Experimental Study Of The Flexural Waves In The Fractured Or Cased Borehole Model |
| title_short | Experimental Study Of The Flexural Waves In The Fractured Or Cased Borehole Model |
| title_sort | experimental study of the flexural waves in the fractured or cased borehole model |
| url | http://hdl.handle.net/1721.1/75230 |
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